ADDITION OF INTEGERS

 ADDITION OF INTEGERS

Addition of integers

 Integers

Integers are all positive and negative natural numbers, including zero.

Z= {... -4 , -3,  -2 , -1 , 0,  1,  2,  3,  4 ...}

Key Concepts:

1.    Positive Integers

·         Numbers greater than zero

·         Written as: +1,+2,+3, etc.

·         Can also be written without the + sign: 1,2,3 etc.

2.    Negative Integers

·         Numbers less than zero

·         Written with a minus sign: −1,−2,−3− etc.

·         Always include the minus sign!

3.    Zero

·         Neither positive nor negative

·         The point where positive and negative numbers meet

 

 

Rules for Adding Integers:

 

1.    Adding Two Positive Numbers

·         Just add them like regular numbers

·         Example: 5+3=85+3=8

2.    Adding Two Negative Numbers

·         Add the numbers and keep the negative sign

·         Example: (−4)+(−2)=−6(−4)+(−2)=−6

3.    Adding a Positive and a Negative Number

·         Find the difference between the numbers

·         Keep the sign of the bigger number

·         Example: (−5)+3=−2 

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